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Date: Mon, 28 Jul 2008 11:47:57 +0400
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To: Nuno Lopes <nlopess@php.net>
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Subject: Re: [PHP-DEV] New optimization idea; was: No runtime fetching of
 built-in global constants
From: dmitry@zend.com (Dmitry Stogov)

It's great. So it's nothing to do in the scanner.
I can just change the CGI code.

Thanks. Dmitry.

Nuno Lopes wrote:
> I'm not Matt, but I'll try to answer :)
> 
> Actually the new re2c scanner already handles the shebang thing, so I
> think you can safely remove the explicit support for it in CGI. We had
> to had that because CLI doesn't explicitly support the shebang line.
> 
> Nuno
> 
> P.S.: now it makes sense why we never found the code in the flex
> scanner that handled the shebang line :P
> 
> 
> On Sun, Jul 27, 2008 at 11:56, Dmitry Stogov <dmitry@zend.com> wrote:
>> Hi Matt,
>>
>> At first as you are a scanner expert, I would like you to look into another
>> optimization idea.
>>
>> Probably for historical reason PHP supports shebang lines
>> (#! /usr/bin/php) on top of php files. Especially to handle them PHP
>> (CGI/FastCGI/CLI) opens file and check for it. So even with opcode caches
>> FastCGI PHP does open syscall for the requested script, however with opcode
>> caches it's absolutely useless.
>>
>> In case PHP scanner will handle shebang lines itself, we will able to save
>> this syscall.
>>
>> I never had time and enough flex/re2c knowledge to implement this idea
>> myself. May be you'll able to look into the problem. In case you find a
>> simple solution we will able to do it in php-5.3.
>>
>> Most PHP hosters and large sites use FastCGI with opcode caches (it is also
>> the primary way for MS Windows users), so this optimization is really
>> important.